Electrical switch mechanism.



No. 788,916. PATENTED MAY 2, 1905.

- H. KRANTZ.

ELECTRICAL SWITCH MECHANISM.

APPLICATION FILED DEC. 6, 1904.

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UNITED STATES Patented May 2, 1905.

HUBERT KRANTZ, OF NEl/V YORK, N. Y.

ELECTRICAL SWITCH MECHANISM.

SPECIFICATION forming part of Letters Patent No. 788,916, dated May 2, 1905.

Application filed December 6,1904. Serial No. 235,735.

To all whom, it may concern:

Be it known that I, HUBERT KRANTZ, a citi- Zen of the United States, and a resident of New York city, borough of Brooklyn, Kings county, State of New York, have invented 1mprovements in Electrical Switch Mechanism, of which the following is a specification.

This invention relates to electrical switch mechanism or panel-boards, and has for its particular object to improve the construction and reduce the cost thereof.

In a patent granted to me on March 22, 1904:, No. 755,141, there is illustrated, described, and claimed an arrangement of bus-bars and cross bars and their electrical connections which present the cross-bars edgewise to the bus-bars, whereby the ends of the cross-bars are approximately flush with the bus-bars and form contacts for switches. iVhile the said patent covers a crossbar formed of any number of pieces, the preferred form shows the cross-bar in one piece having a portion adapted to make electrical connection with a busbar and to hold the cross-bar away from and edgewise to the bus-bars. My present invention is an improvement on the single-piece cross-bar shown in said patent, givinga more rigid cross-bar with considerably less material.

In the accompanying drawings, Figure 1 is a plan or face view of one form of switch mechanism to which my improvements may be applied, some of the parts being omitted as unnecessary for a proper showing of my invention. Fig. 2 is an end view looking at Fig. 1 from the right. Fig. 3 is a sectional View taken on line 3 3 of Fig. 1. Fig. 4E illustrates the blank for forming one of the middle cross-bars shown in Fig. 1. Fig. 5 is a perspective view of this bar when the blank has been bent to the shape for use on the switch. Fig. 6 illustrates the blank from which the end cross-bars shown in Fig. 1 are made, and Fig. 7 is a perspective view of this bar when the blank is bent to shape for use. My improvements may be applied to other forms of switch mechanism, that shown in the drawings being by way of example only.

Figs. 1 to 3 illustrate the insulating baseplate A, carrying bus-bars B B, which preferably rest upon plate A, and cross-bars C to 1 C mounted edgewise above the busbars. The cross-bars U" to are in pairsthat is, U and C are part of a single blank shown separately in Fig. 4:. Cross-bars 6* C are formed from a second blank, and C C from a third blank.

Fig. 4 illustrates the blank 1 for these middle cross-bars. This is rectangular, or substantiall y so, and has three cuts or slits therethrough to provide a central tongue, which is bent on lines 2 3 to form an angle-piece having an upright c and a base 0, Fig. 5. Two sides of the blank are bent on lines 4 in the opposite direction to that of the tongue 0 c and form the crossbars proper, (J G The blank 1 being flat, or approximately so, the cross-bars proper will also be flat.

It will be evident from Figs. 1, 2, 3, and 5 that when the base 0 is secured to a bus-bar (B, for instance) the upright 0 will support the cross-bars C (1 above the bus-bars and edgewise thereto.

The portions 0 0 of the double cross-bar act as braces between the ends of the cross-bars and materially strengthen the construction.

The bent tongue 0 0 acts in two capacities first to hold the cross-bars C C edgewise above the bus-bars B B, and, second, to make the proper electrical connection between the crossbars and the bus-bars. The upright c is high enough to raise the cross-bars a safe distance from the bus-bars, whereby the ends of the cross-bars, while approximately flush with the bus-bars, may form contacts for the switches, such as shown at D in Figs. 1 and 2.

The end cross-bar C and C may be formed by cutting one of the middle cross-bars (shown in Fig. 5) in two longitudinally, or it may be formed in any other suitable manner. 1 have shown these end cross-bars as formed from a blank 11. (RepresentedinFig. 6.) Thisisrectangular, or substantially so, and has a cut therethrough to provide a tongue, which is bent on lines 12 13 to form an angle-piece having an upright c and a base 0", similar to and for the same purposes as the tongue of blank 1,. Blank 11 is again bent on line 14 in a direction opposite to that of the upright c and constitutes a single cross-bar for end bars G G Insulating-blocks E may be used for steadying the ends of the cross-bars not connected to the bus-bars.

I claim as my invention 1. In electrical switch mechanism, the combination of bus-bars, with a cross-bar formed from a substantially rectangular flat blank, said blank being slit to provide a tongue and said tongue being bent to form an angle-piece adapted to make electrical connection with a bus-bar to hold the body of the cross-bar away from the bus-bar.

2. In electrical switch mechanism, the combination of bus-bars, with a cross-bar formed from a substantially rectangular fiat blank, said blank being slit to provide atongue, said tongue being bent in one direction from the plane of the blank, and a portion of the blank, constituting the cross-bar proper,being bent in the opposite direction, said tongue adapted to make electrical connection with a bus-bar and support the cross-bar proper edgewise to the bus-bars.

3. In electrical switch mechanism, the combination of bus-bars, with a cross-bar formed from a substantially rectangular, flat blank,

said blank being slit to provide a tongue, portions of the blank at each side of the tongue being bent in one direction from the plane of the blank to form eross-bars proper, and said tongue being bent in the opposite direction and adapted to make electrical connection with a bus-bar and support the cross-bars away from and edgewise to the bus-bars.

4:. In electrical switch mechanism, the combination of bus-bars, with cross-bars formed from a substantially rectangnlar liat blank, said blank being slit at the central portion to provide a tongue, said tongue being bent in one direction from the plane of the blank, and portions of the blank at each side of the tongue being bent in the opposite direction, to constitute the cross-bars proper, the remaining portions of the blank forming braces between the ends of the cross-bars.

5. In electrical switch mechanism, the combination of bus-bars, with two approximately flat cross-bars ending substantially linsh with the bus-bars, braces between the ends of said cross-bars, an angle-piece adapted to be secured to one of the bus-bars, and support said cross-bars above and edgewise to said busbars, said cross-bars, braces and angle-piece being formed from a single blank.

6. In electrical switch mechanism, the combination of a bus-bar, with a cross-bar formed from a rectangular blank having two parallel sides bent upward, and means for holding the bent-up side, away from and edgewise to the bus-bar, and making electrical connection between said cross-bar and said bus-bar.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HUBER'I KRANIZ.

Vitnesses:

E. IloMAN, S. L. NHrrLook. 

